Data Collection Interval

skitter Monitors

The set of skitter monitorsused in the ITDKs varies depending on the kit.

Kit #0204: contains data from 21 monitors.

Kit #0304: contains data from 23 monitors.

Probe Lists

Over several years, CAIDA has developed and managed lists of hosts to
probe using our lightweight traceroute tool
skitter.
CAIDA seeks to maximize
address space coverage (1 probe per /24 in the IPv4 space)
while remaining sensitive to do-not-probe requests
from particular hosts. Two of CAIDA's major probe lists are 1) the IPv4
list, containing destinations spread over BGP-routed IP
space and /24 blocks;
and 2) the DNS list, containing destinations collected from
queries to the DNS root server. There are several different sized versions
of the IPv4 list to accomodate the varying capacity of the skitter
monitors.

Kit #0204:

IPv4: 133k, 301k, or 825k addresses

DNS: 143k addresses

Kit #0304:

IPv4: 147k, 366k, or 865k addresses

DNS: 147k addresses (different than the 147k IPv4 addresses)

ITDK #0204 Directory Structure

There are several directories containing different
categories of data. README files in these directories describe files and file formats in more detail. The master processing
sequence resides in SKI/procSki.

parsing scripts, C programs and command sequences,
(including a script for analyzing RouteViews tables,
a program for converting IP addresses to prefixes, and
scripts for abstracting data into BGP atoms..